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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>区块标签和行内标签</title>
    <style>
        .color {
            color: red;
        }
    </style>
</head>
<body>
    <div>
        <span class="color">这里是第一行</span>
        <span>这里是第二行</span>
    </div>
    <b>123</b><span>222</span>
    <ul>
        <li>html</li>
        <li>css</li>
        <li>js</li>
    </ul>
    <div>勇往直前</div>
</body>
</html>